Was fine yesterday, felt stiff when I woke this morning. I remember at one point waking up and I was sleeping on my left side, maybe I aggravated it o/night. I'm pretty much trained not to now but still lapse.
Found some muscle soreness in the back of the shoulder, working it with a lacrosse ball to see if that clears it up. The ache comes and goes in waves.
Back in the office and its cold, could be a variable.
UPDATE : Wrapped up super warm @ home and continued w/ lacrosse ball. No pain in the evening.